Mesa (master): nir/spirv: improve mmap() error handling

[Jason Ekstrand]

Module: Mesa
Branch: master
Commit: c86793804498a33e36302b670d3a8b095f9bdc93
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c86793804498a33e36302b670d3a8b095f9bdc93

Author: Eric Engestrom <eric at engestrom.ch>
Date:   Sun Sep 25 16:49:52 2016 +0100

nir/spirv: improve mmap() error handling

Signed-off-by: Eric Engestrom <eric at engestrom.ch>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

---

 src/compiler/spirv/spirv2nir.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/compiler/spirv/spirv2nir.c b/src/compiler/spirv/spirv2nir.c
index a024028..3dc0735 100644
--- a/src/compiler/spirv/spirv2nir.c
+++ b/src/compiler/spirv/spirv2nir.c
@@ -38,6 +38,8 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <errno.h>
+#include <string.h>
 
 #define WORD_SIZE 4
 
@@ -62,7 +64,13 @@ int main(int argc, char **argv)
    size_t word_count = len / WORD_SIZE;
 
    const void *map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
-   assert(map != NULL);
+   if (map == MAP_FAILED)
+   {
+      fprintf(stderr, "Failed to mmap the file: errno=%d, %s\n",
+              errno, strerror(errno));
+      close(fd);
+      return 1;
+   }
 
    nir_function *func = spirv_to_nir(map, word_count, NULL, 0,
                                      MESA_SHADER_FRAGMENT, "main", NULL);